He looked like the model FBI agent—but for 22 years, he was feeding America’s deepest secrets to the enemy.

Robert Hanssen lived a double life. Outwardly, he was a devout Catholic, a loving father, and a decorated FBI agent. Secretly, he was one of the most dangerous spies in U.S. history—trading classified intelligence with the Soviet Union and Russia for over two decades, causing irreparable damage to national security.

In Robert Hanssen: The FBI Mole Who Played a Deadly Game, David G. Stone unravels the psychological complexity and chilling impact of a man who outwitted the very agency tasked with protecting America. This is the inside story of betrayal, surveillance, and the deadly price of deception.